Dégradation du pack de batterie hybride

The traction battery ageing — capacity shrinking and internal resistance climbing, which every pack does from the day it is built. As a cause, it explains far more than its own codes: an aged pack demands constant charging (overworking the generator and its inverter), cannot deliver the current a healthy motor needs (so motors "underperform"), runs hotter for the same work, and sags to the state-of-charge floor faster than management can compensate. A tired battery is the commonest reason healthy hybrid components report trouble, which is why a battery health report belongs near the start of most hybrid diagnoses rather than the end.

The signature the driver sees is the charge display swinging full-to-empty in minutes — the weakest cell group defines the whole pack's window, and divergence narrows it. Two things to check before anyone pays: the warranty (traction packs are covered for eight years or more in many markets) and the per-block data (one or two collapsed modules often explain the verdict, and module-level repair exists). And the fan: packs age early when their cooling fan is choked, so the cause behind this cause is often dust.